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Titolo:
NITROGEN-FIXATION AND NITROGEN-FERTILIZATION OF SOYBEANS
Autore:
MERBACH W; JACOB HJ;
Indirizzi:
ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH EV,INST RHIZOSPHARENFORSCH & PFLANZENERNAHRUNG D-15374 MUNCHEBERG GERMANY
Titolo Testata:
Isotopes in environmental and health studies
fascicolo: 2-3, volume: 32, anno: 1996,
pagine: 173 - 180
SICI:
1025-6016(1996)32:2-3<173:NANOS>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
CULTIVAR; PLANTS; STRAIN; SOIL;
Keywords:
FERTILIZATION; FLOWERING; N-15; N-2; FIXATION; N TRANSLOCATION; SEED YIELDS; SOIL; SOYBEAN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
W. Merbach e H.J. Jacob, "NITROGEN-FIXATION AND NITROGEN-FERTILIZATION OF SOYBEANS", Isotopes in environmental and health studies, 32(2-3), 1996, pp. 173-180

Abstract

In pot experiments with N-15 labelled soil and mineral N-15, the influence of Bradyrhizobium (Rhizobium japonicum) inoculation and N fertilization on the symbiotic N-2 fixation and yield of soybeans [Glycine max (L. ) Merill., cv. 'Fiskeby V'] was investigated. Symbiotic N-2 fixation only occured after inoculation with Bradyrhizobium. Considerable differences in efficiency of the bacterial preparations were observed. Shortly after flowering, the symbiotic nitrogen fixation was finishedand, subsequently, soybeans took up considerable N amounts from the soil. N fertilization al seeding suppressed N-2 fixation of soybeans. In this case, the dry matter and nitrogen yield increased, because the loss of fixed nitrogen was overcompensated by the mineral N uptake. During flowering of soybeans, the N-2 fixation was not affected by N supply, because this process was already terminated. The mineral N was additionally available to the plants and led to increased N amounts in plants. It was absorbed to a considerable degree by soybeans. The mineral N was translocated (partly, after intermediate storage in the vegetative organs) into the seeds thus increasing their yields.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 13:44:30